Lap arrester for winding machines



June 25, 1935. o, McKEAN LAP ARRESTER FOR WINDING MACHINES Filed June20, 1933 2 Sheets-Sheet l INVENTOR ATTORNEYS June 25,-.1935. J. 0.McKEAN LVAP ARRESTER FOR WINDING MACHINES Filed June 20, 1953 2 sheetssheet 2 INVENTOR ATTORNEYS- Patented June 25, 1935 LAP ARRESTER FOR.WINDING MACHINES John 0. McKean, Westfield, Mass, assignor to FosterMachine Company, Westfield, corporation of Massachusetts Mass, at

Application June 20, 1933, Serial No: 676,621

7 4 Claims. (Cl. 242-19 In winding thread upon a package by means of arotary friction actuating mechanism, it sometimes happens that thethread breaks near the package and is caught and wound up by the rotaryactuating member. Under certain other conditions the same resultisobtained. In view of the high speed at which the actuating memberrotates, the thread very quickly wound up into what is termed a lap,which necessitates stopping the machine in order to remove it.

One object of my invention is to provide a means of quickly andautomatically severing the thread and thereby stopping the winding ofthe thread on the actuating member when such a lap has been begun.

Another object of my invention is to automatically detect the buildingup of such a lap in its early stages, and subsequently to scverthethread and thereby stop the further building up of the said lap.

A third object of my invention is to provide such a device as isindicated in the above objects which will be of extremely simpleconstruction and which may readily be assembled and disassembled.

Other objects and advantages will be apparent as my invention is furtherdescribed.

A practical embodiment of my invention is represented in theaccompanying drawings, in which Fig. 1 represents a vertical transversesection through so much of a winding machine as will give a clearunderstanding of the construction and operation of my lap arrester, theparts being in the positions they assume as the thread is being woundonto the package, and when no lap being formed;

Fig. 2 represents an enlarged vertical transverse section thmugh thatportion of the winding machine shown in Fig. 1 which includes my laparrester, the parts being in the positions they assume when the. threadhas become so engaged with the rotary actuating member as to be woundthereupon, forming a lap of suficient size to actuate my lap arresterand thereby cut the thread;

Fig. 3 represents a cross section of the structure shown in Fig. 2,taken along the line III- III of Fi 2;

Fig. t represents a plan. view of the same; and

Fig. 5 represents a perspective View of the cutting element shown in theother figures.

It should be understood that by the term thread as used in thisapplication, I mean to include yarn, cord or other media which can besuccessfully handled by a winding machine.

It should also be noted that although I have here represented my laparrester in connection with a rotary traverse winding machine, it isreadily adaptable to' any machine wherein the package is actuatedfrictionally'by meansof a. winding roll since the increase in diameterof any such drum due to the formation of a lap may be used similarly toactuate the thread-severing means.

It may here be pointed out that given a certain type of machine it isgenerally possible to'predict with some degree of accuracythat portionof a, roll which will be liable tolap building, since if the lap resultsfrom a failure of the traversing means, the thread will have a tendencyto wind down on a roll until it reaches a. point where the thread makesa right angle to the line of tangency of the surface of the roll to theplane in which the thread is ordinarily traversed. This is another-wayof saying that the thread will so move on the roll that it is theshortest distance away from the guiding point. If one considers the lapwhich might be built up upon'a cylindrical roll such as is'shown inthlsapplicetion, where the thread is guided from a. point equidistantthe ends of the roll, the area where the lap will be built upwillnecessarily be at the middle of the roll. For this'reason it is notnecessary for the contacting member, later described, to be the fullwidth of the roll.

5 PATENT OFFICE The winding machine construction shown in Fig. 1, asidefrom the novel features to be described below, are of a nature wellunderstood in the art, and will, therefore, not be described in detailother than to say that conical package I is carried by forwardlyprojecting arm 2 and in the position shown in Fig. 1 lies in contactwith and is actuated by traverse roll 3, which revolves in the directionof the arrow, as indicated in Figs. 1 and 2. The thread as it unwindsfrom bobbin 4 passes through tension device 5, through detector wire 6,over stop motion cover I, over traverse roll 3 and onto package I. Stopmotion cover I is mounted on the stop motion mechanism in a well knownmanner by means of a screw 8. Attached to the under side of stop motioncover 1 is bracket 9 having depending ears l0, I9, which ears ID areprovided with holes II, I I through which are pivoted the ends of springwire l2, which is snapped through holes ll, pivoting in position laparrester 13, such lap arrester being shaped as shown in the drawings,having a stop portion I I which normally rests against stop motion coverI, as shown in Fig. 1, two split and deformed portions l5, 15 serving toprovide the means of engagement between spring wire i2 and lap arresterl3, arcuate roughened portion l6 serving as a means of contact betweensaid lap arrester and lap l1, and a knife supporting portion l8 ontowhich knife portion I9 is soldered. The central portion of the laparrester is cut away at and near its axis on spring wire I2 so as toprovide space for the free play of spring 20 attached at one end througha lug 2| on the under portion of stop motion cover I, and at its otherend to the lap arrester [3 at the end of the cut away portion nearestits stop portion 14. It will be seen that the spring serves to throw thelap arrester from an intermediate position either way to its entirelyretracted position as shown in Fig. 1 or to its thread-severing positionas shown in Figs. 2, 3 and 4.

Stop motion cover I is cut away at and near the central portion of theedge nearest to the traverse roll 3 so as to provide a space throughwhichthe lap arrester may swing in order to contact with the thread. Thehorizontal edge of this cut away portion 22 serves as a stop to limitthe upward movement of the lap arrester as it swings into operatingposition.

In operation, when for any reason the thread begins to. wind upon thetraverse roll, the lap is formed with great rapidity. This lap occurs ator near a single portion of the traverse roll in the form of windingmachine here described, due to the fact that upon its formation thetraversing means is rendered inoperative. Roughened por tion of the laparrester is adjusted in close proximity to the traverse roll, and as thelap reaches such a size as to enable it to contact with this roughenedportion, it engages such portion and swings it immediately into theposition shown in Figs. 2, 3 and 4, whereupon knife-holding end i8 ofthe lap arrester operates, if necessary, to guide the thread into knifeI9, which immediately cuts the thread, arresting the building up of thelap, and also enables detector wire 6 to drop, serving, through the stopmotion mechanism, to lift the package away from the traverse roll. Bythis same motion roughened portion It is swung away from the lap I! soas to avoid damage to the lap arrester from the fastrotating lap, andthe spring 20 serves to make certain that the knife is carried to itsuppermost position, and retains it in such position until it is manuallydepressed. The machine is then stopped, at the convenience of theoperator, the lap is removed, the lap arrester is snapped down to itsinoperative position, and the machine is threaded and started in theusual manner.

It will thus be seen that I have devised a lap arrester for use inwinding machines which is automatic in operation, and which may detect alap immediately upon its being formed, and will out the thread, therebypreventing the waste of additional thread. This lap arrester furthermoreprevents the lap from growing, as it might were it neglected, to suchproportions as to interfere with or possibly injure other portions ofthe winding machine and does this with a uniform certainty andpromptitude which cannot be achieved by the old methods wherein it wasnecessary for the human element to play a large part. a

It is evident that various changes may be resorted to in theconstruction, form and arrangement of the several parts withoutdeparting from the spirit and scope of my invention, and hence I do notintend to be limited to the particular embodiment herein shown anddescribed, but

What I claim is:

1. In a winding machine, a stop motion cover, means pivoted to the underside of the stop motion cover, said means having a roughened portionadapted for contact with a lap, and a thread-severing means carried bysaid means.

2. In a winding machine, a winding roll, and a swinging lap arresterhaving: means limiting the amplitude of its swing, a portion proximateto but out of contact with said winding roll, and a thread-severingportion.

3. In a winding machine, a winding roll, a swinging lap arrester having:means limiting the amplitude of its swing, an arcuate roughened portionproximate to but out of contact with said winding roll, and athread-severing portion adapted to sever the thread.

4. In a winding machine, a swinging pivoted element adapted for contactwith a lap. a threadsevering means carried by said element, and meansfor urging said element away from a position intermediate the ends ofits swing.

JOHN O. MCKEAN.

